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Finding the Fourth Proportional to 438,291.90, 656,330.67 and 349,718.40

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Solution

The fourth proportional to 438,291.90, 656,330.67 and 349,718.40 is: 523,694.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,291.90 : 656,330.67 = 349,718.40 : x
  2. Step 2: Convert to fraction form
    438,291.90/656,330.67 = 349,718.40/x
  3. Step 3: Cross multiply
    438,291.90x = 656,330.67 × 349,718.40
  4. Step 4: Simplify right side
    438,291.90x = 229,530,911,783.33
  5. Step 5: Solve for x
    x = 229,530,911,783.33/438,291.90
  6. Step 6: Final answer
    x = 523,694.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.